OCPEDGE-1690: add dual-replica templates

[qJkee]

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@qJkee: This pull request references OCPEDGE-1690 which is a valid jira issue.

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[jaypoulz]

Can we move these templates over to the master role directory for inclusion?
e.g. /templates/master/00-master

If we do add compute nodes, we don't want them added to the pacemaker cluster.

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PR needs rebase.

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